Mitsubishi Heavy Industries S3L, Service Manual

Page: 175 / 200

ADJUSTMENT AND OPERATION
13-7
1.6 Adjusting V-belt tension
(1)
Loosen the adjusting bolt and fixing bolt of the
alternator. Loop the V-belt over the water pump pulley,
alternator pulley and crankshaft pulley.
(2)
With the alternator pushed toward the V-belt tension
side, tighten the adjusting bolt at an appropriate
position.
(3)
Inspect the V-belt tension to make sure it is within the
specified value.
Note: When replace the belt with a new one, the deflection
should be 8 to 13mm {0.31 to 0.51mm} because of
the new belt is extensible. After replacing, operate the
engine at idling speed for 5 to 10 minutes, and adjust
the belt tension to set the deflection 10 to 15 mm
{0.39 to 0.6mm}.
Adjusting deflection of V-belt
Belt tension
(with pushing force of approx.
98 N {10 kgf} [22 lbf])
Approx. 10 to 12 mm
[0.39 to 0.47 in.]
Adjusting bolt
Approx.
10 to 12 mm
[0.39 to 0.47 in.]
Deflection approx.
10 to 12 mm [0.39 to 0.47 in.]
(pushing force:
approx. 98 N {10 kgf} [22 lbf])